Throttle-valve



C. C. HANSEN. THROTTLE VALVE.

APPLICATION FILED SEPT. 24. I918.

Patented July 6, 1920.

l/VVEN TOR C Li ATTORNEY UNITED STATES PATENT OFFICE.

CHARLES C. HANSEN, OF'EASTON, PENNSYLVANIA, ASSIGNOIt TO INGEItSOLL-RAND CoMPANY oF JERSEY CITY, NEW JERSEY, A CORPORATION OF NEW JERSEY.

THROTTLE-VALVE.

Specification of Letters Patent.

Patented July 6, 1920.

Application filed September 24, 1918'. Serial No. 255,466.

To all whom it may concern:

Be it known that 1, CHARLES C. HANSEN, a citizen of the United States, residing at Easton, in the county of Northampton and State of Pennsylvanizuhave invented a certain new and useful Improvement in Throttle Valves, of which the following is a specification;

This invention relates to a throttle valve,

and in particular to one adapted to control I the admission of motive fluid to the operating parts of a percussive drill and cleansing fluid to a drill steel used in connection with the same.

The obj ects of the present, invention are to provide a throttle valve conveniently mounted in a part of the drill and adapted to be operated by a single handle, 'to control the amount of motive fluid used to operate the piston of the drill and also to regulate the supply of cleansing fluid admitted to the drill steel and also to control the admission of motive fluid and cleansing fluid at the proper time relatively to each other.

With the above and other objects in view my invention consists in the features of construction and operation set forth in the following specification and illustrated in the accompanying drawings, forming a part hereof, inwhich,

Figure 1 shows a cross section of a part of the percussive drill, showing the throttle valve in longitudinal section;

Fig. 2, a section along the line II-II of Fig. 1, at right angles to that of Fig. 1, talaen through a portion of the throttlej an Fig. 3, a section at right angles to Fig. 1, taken along the line III-+111 thereof.

Referring more particularly to the figures of the drawing, the percussive drill 1 is provided with a hole 2 bored transversely from side to side of the drill body, this hole being tapered oppositely from either end, the axes of the tapered portions being in alinement with each other. Within one of the tapered portions of this hole the motive fluid supply throttle valve 3 is seated and adapted to be rotated to admit variable quantities of motive fluid to the drill in the usual way. Within the other tapered portion of the hole 2 is seated the valve 4, which is adapted to control the admission of cleansing fluid to the drill steel and to be operated by movement of the valve 3 simultaneously with the motive fluid throttle. The throttle valve 3 is provided with an extension 5 extending from its smaller end over which the valve 4 is adapted to slide. Preferably, this extension 5 is squared so that rotation of the valve 3 rotates the valve 4 Without any further connection betweenthese parts. valve3 is held firmly in its seat by the pressure of fluid pressure against its larger end as is usual in this type of valve and a plug 6 closes the end of hole 2 and also serves to hold the fluid nipple 7 in place through which motive fluid is supplied to the drill. Secured to the valve extension 5 by means of a pin 8 is a throttle handle 9, rotation of which serves to rotate both the valves above referred to. Between the valve and handle 9 a spring 18 extends serving to hold the valve 4 firmly seated. The throttle valve 3 is provided. with ports 10, 11, 12, by means of which fluid under pressure is admitted from the nipple 7 to the working parts of the drill; that is, to the piston cylinder and also to the feed cylinder, but as this forms no part of the present invention, a further description is not thought to be necessary.

There is also formed in this throttle valve 3 an additional port or passage 13 by means of which a portion of the motive fluid is allowed to pass from the fluid nipple? to a conduit 14 extending to the forward end of the drill ,(not shown) for the purpose of aiding the removal of cuttings from the drill steel by mingling with and forcing the cleansing fluid, which is usually water, to the bottom of the hole being drilled. This passage 13 for fluid from the valve 3 to the conduit 14 is opened and closed by rotation of the throttle valve 3, as will be obvious from .an inspection of Fig. 2, the passage 13 being open to the conduit 14 during a portion of the rotation of the throttle valve 3 as indicated bythe enlargement 13. The valve 4 which is rotated with the valve 3 in the manner above described is provided with a port 15 extending partway around the periphery of the valve 4 for the purpose of opening and closing communication between a water connection 16 and a conduit 17 leading to the forward end of the drill. This port 15 is provided in such a position on valve 4 that communication will not be opened between the water connection 16 and conduit 17 until the air pressure has been supplied to the The operating parts of the .drill through ports 10, 11, 12, and to the conduit 14. This is 'forthe purpose of preventing water being admitted to the front end of the drill before there is fluid pressure present to keep it from flowing throughthe various parts of the drill. The combined air and water sup plied to the front end of the drill through conduits 14 and 17, respectively, are forced through the drill steel to the cutting edges of the drill in any well known manner. Re-v verse movement of the throttle handle first closes off communication between the water connection 16 and conduit 17 and then a further rotation of the throttle handle 9 finally closes off the air pressure supply.

It is tobe understood that the present showing and description disclose only one specific embodiment of the present invention, and that other forms and modifications are included within the spirit and scope of the invention, as expressed in the appended claims. 7

What I claim is: 1

1. A throttle valve for percussive drills, adapted to control the admission of motive fluid to the tool and cleansing fluid to the drill steel, comprising'a casing having alined oppositely tapered valve seating port1ons,tapered valves seated in said portions, a spring adapted to press both of said valves against their seats and means for simultaneously op-' erating said valves.

' 2. A throttle valvefor-percussive drills,

second tapered valve to its seat, and common operating means connected to said stem,

3. A throttle valve'for percussive drills, adapted to control the admission of motive fluid to the tool and cleansing fluid to the drill steel, comprising a casing having alined oppositely tapered Valve seating portions, a tapered valve in one of said portions, having a stem extending. into the other portion, a

tension, a spring 'forcing and holding said tapered Valve mounted on said extension, 7

common operating means connected to said stem, and a spring compressed between said operating means and the second named valve for pressing both valves to their seats.

my hand. i 7

CHARLES c. HANSEN.

In testimonywhereof, I have hereunto set 

